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Fundamental Understanding of Natural Organic Matter (NOM) Rejection by, and Fouling of, High Pressure Membranes 对天然有机物(NOM)被高压膜截留和污染的基本理解
发布日期: 2004-11-15
韩国四个水源中的天然有机物(NOM)为 对韩国供水公司和三个美国水源的代表进行了描述 通过溶解有机碳(DOC)、紫外吸收(UVA)254、比紫外吸收(SUVA)、XAD 8/4分馏、SEC-DOC/UV、蛋白质和 碳水化合物含量、荧光激发和发射矩阵(EEM),以及 溶解有机氮(DON)。藻类有机物和废水对水体的影响 显示高含量胶体有机物和/或大分子的指纹。信息技术 值得注意的是,高含量的胶体有机物和/或大分子 与DOC和高MW DOC的HPI分数增加有关。 为了模拟集成膜系统(IMS),对水源进行了分析 使用0.22毫米的过滤器进行预过滤。预过滤水在6小时后通量下降较小 过滤效果优于0.45mm预滤水,截留率高达97% 基于DOC。然而,傅里叶变换红外光谱(FTIR)分析揭示了多糖的特征 沉积在膜表面。这表明造成严重污染的污染物 通量衰减在0.45~0.22 mm之间,这些大小反映了胶体有机物 和/或大分子。包括4个参考文献、表格和图表。
Natural organic matter (NOM) present in four Korean water sources as representatives of Korean water supplies, and three U.S. water sources were characterized by dissolved organic carbon (DOC), ultraviolet absorbance (UVA) 254, specific ultraviolet absorbance (SUVA), XAD 8/4 fractionation, SEC-DOC/UV, protein and carbohydrates contents, and fluorescence excitation and emission matrix (EEM), and dissolved organic nitrogen (DON). Algal organic matter and effluent impacted waters exhibit a fingerprint of high content of colloidal organic matter and/or macromolecules. It is noteworthy that the high content of colloidal organic matter and/or macromolecules are associated with an increase in the HPI fraction of DOC and high MW DOC. In order to simulate an integrated membrane system (IMS), water sources were prefiltered with a 0.22 mm filter. Prefiltered water showed less flux decline after 6 hours of filtration than 0.45 mm prefiltered water while the rejection rate reached up to 97% based on DOC. However, Fourier Transform Infrared Spectroscopy (FTIR) analysis revealed a signature of polysaccharides deposited on the membrane surface. This indicates that the foulant causing a significant flux decline is between 0.45 ~ 0.22 mm and these sizes reflect colloidal organic matter and/or macromolecules. Includes 4 references, tables, figures.
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发布单位或类别: 美国-美国给水工程协会
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